Answer:
Option A, is correct
Step-by-step explanation:
Out of three students, the reading observed by two students i.e 98 cm and 99 cm are precise to each other. The only outlier is the reading taken by third student i.e 70 cm.
Hence, there are high chances of third student being wrong while noting down the reading on meter stick
If meter stick was of nonstandard size, then all the students must have observed varying values.
Option A, is correct