Help pl! Im timed How did ancient Indians measure length?

A. by using precise rulers

B. by stacking square bricks

C. by using the binary system

D. by observing and estimating

answer; (c) on the left side; ; ; ; ; ; ; ; ; ; ; ; ; speech is localized on the left side of the brain;

answer; i believe the correct answer is (a) the correlation between the cause variable and outcome variable is zero;