A second-grade teacher is observing her students problem-solve Math word problems. What is perhaps the MOST important drawback when students go directly to writing a number sentence first in order to solve a problem?

A. They may not be able to work cooperatively when solving the problem this way
B. They may not be able to show their problem-solving strategy on paper without using manipulatives first
C. They may not be able to make connections between the problem and their work
D. They may not know the correct words to use to explain their thinking