For the experiment to be valid,

For the experiment to be valid, it is______ to record the data accurately.
A、convenient
B、feasible
C、essential
D、tricky
【正确答案】：C
【题目解析】：句意：为了实验的有效性，准确的记录数据是必不可少的。it is essential to…做..是必不可少的。