Imagine Emma and Rohan are busy scientists in a lab. Convert their exciting moment into the past perfect tense: “Emma and Rohan check data after they arrive at the laboratory.”

A. Emma and Rohan checked data after they arrive at the laboratory.

B. Emma and Rohan have checked data after they arrive at the laboratory.

C. Emma and Rohan had checked data after they arrived at the laboratory.

D. Emma and Rohan will have checked data after they arrive at the laboratory.