11. Which sentence contains a singular subject?

A. Several in the audience gave the actors a standing ovation.

B. Both Jerry and his sister attended the meeting.

C. Any of those ideas sounds good to me.

D. The deer entered the forest at the same place they had come out.

D. The deer entered the forest at the same place they had come out.

Explanation:

(1) Both Jerry and his sisterthis is plural because it is more then 1.

(2) Several ...talking about more then 1so its plural

(3) The deerthis could be singular or plural...however, when u read further, it later says " the same place THEY had come outso it is plural.

(4) Any (of those ideas)Any (ONE) of those ideassingular

The deer entered the forest at the same place they had come out.

The = Singular

the direction of the magnetic field produced by an electric current will change when the direction of the electric current changes. for example : if a current is flowing in a straight length of wire, the magnetic field is described by a concentric circle (using right-hand rule).