Which sentences include errors in the use of possessives or contradictions that should be corrected? Select the two correct answers.

A. Don’t forget to pack your coat and hat, because it’s going to be snowing in Minnesota all week.
B. We are not certain who’s textbooks these are, but we want to find out so that we can return them.
C. Their electricity has been cut off since the storm, and they’re using candles for light.
D. You’re going to have to discuss your project in simpler terms so that everyone can understand.
F. Go check the front door and see who’s there, because it might be one of my neighbors.

The correct sentences are C. Their electricity has been cut off since the storm, and they’re using candles for light. and D. You’re going to have to discuss your project in simpler terms so that everyone can understand.

The incorrect sentences are A. Don’t forget to pack your coat and hat, because it’s going to be snowing in Minnesota all week. (it's should be their); B. We are not certain who’s textbooks these are, but we want to find out so that we can return them. (who's should be whose); and F. Go check the front door and see who’s there, because it might be one of my neighbors. (who's should be whose).

The sentences that include errors in the use of possessives or contradictions that should be corrected are:

A. Don’t forget to pack your coat and hat, because it’s going to be snowing in Minnesota all week.
B. We are not certain who’s textbooks these are, but we want to find out so that we can return them.

Corrected sentences:

A. Don’t forget to pack your coat and hat because it is going to be snowing in Minnesota all week.
B. We are not certain whose textbooks these are, but we want to find out so that we can return them.

The correct answers are B and D.

Explanation:
A. This sentence does not have any errors in the use of possessives or contradictions.
B. The error in this sentence is the use of "who's" instead of "whose." "Who's" is a contraction of "who is" or "who has," whereas "whose" is the possessive form of "who." The correct sentence should be: "We are not certain whose textbooks these are, but we want to find out so that we can return them."
C. This sentence does not have any errors in the use of possessives or contradictions.
D. The error in this sentence is the use of "your" instead of "you're." "Your" indicates possession, whereas "you're" is a contraction of "you are." The correct sentence should be: "You're going to have to discuss your project in simpler terms so that everyone can understand."
E. This sentence does not have any errors in the use of possessives or contradictions.