Select the correct form of the possessive for the underlines word(s).

On Captain Davis advice, we took the boat out of the water.

A) Davis's

B) Davis'

C) Davis

D) Davises

B) Davis'

To determine the correct form of the possessive for the underlined word "Davis," we need to follow the rules for forming possessive nouns.

In this case, we need to form the possessive of a singular noun that ends in "-s." According to the general rule, if a singular noun ends in "-s," you can add an apostrophe and another "-s" to form the possessive.

Now let's apply this to the given sentence: "On Captain Davis advice, we took the boat out of the water."

The correct answer is A) Davis's. This form adds an apostrophe and another "-s" to the word "Davis" to signify possession: Captain Davis's advice.

The correct form of the possessive for the underlined word "Davis" is:

A) Davis's