Which of the following activities are examples of data gathering?

Asap 25 pts + brainliest to right/best answer

An an average person has 6×10 by the power of two as many red blood cells as white blood cells a small sample of the blood has 7×10 by the power of three white blood cells about how many red blood cells are in the sample

If a || b and b | y, then ? a) x || y. b) x | a. c) a | y. d) a || y.