Which of the following sentences contains a redundancy?

A. Chris had trouble working up even mild enthusiasm for Mike's plan.
B. Steve admired the partially completed stadium.
C. Emily's sister gave birth to a pair of twins.
D. At no time did Tony indicate a willingness to admit defeat.
My answer is C

correct. How many kids is a pair of twins? or a pair of triplets?

To identify the redundancy among the given sentences, we can look for any words or phrases that are unnecessarily repetitive or add no additional meaning to the sentence. Let's examine each sentence:

A. "Chris had trouble working up even mild enthusiasm for Mike's plan."
This sentence does not contain any redundancies. It simply states that Chris had difficulty developing even slight enthusiasm for Mike's plan.

B. "Steve admired the partially completed stadium."
This sentence does not contain any redundancies. It states that Steve admired the stadium, specifically the parts that have been completed.

C. "Emily's sister gave birth to a pair of twins."
This sentence does contain a redundancy. The phrase "a pair of" is unnecessary because the word "twins" already implies that there are two. So, this sentence could be simplified to "Emily's sister gave birth to twins."

D. "At no time did Tony indicate a willingness to admit defeat."
This sentence does not contain any redundancies. It emphasizes that Tony never showed any willingness to admit defeat at any point in time.

So, you're correct. Option C ("Emily's sister gave birth to a pair of twins") contains a redundancy.