This question is based on the following four sentences.

   1. Netta and Jim wrangled over their views of free trade.

   2. Netta and Jim expressed different views on free trade.

   3. Netta and Jim argued vociferously over the issue of free trade.

   4. Netta and Jim bickered over the issue of free trade.

Which of the four sentences is neutral?

A. 2
B. 4
C. 1
D. 3