Which of the Following Sentences Is an Example of Mixed

Multiple Choice

Which of the following sentences is an example of mixed construction?

A) Students should choose their majors after carefully considering their areas of interest.
B) The team and the cheerleaders are on the field.
C) The customer is allowed to return the product but you are allowed to do so only within the warranty period.
D) John and his wife Jane visit us regularly.
E) Everyone in the class bought tickets for the show.