—Jane got an "A" in the Maths test.

—_________. She works the hardest in our class. [ ]

A. Many hands make light work

B. The grass is always greener than the other side

C. Early birds catch the worm

D. Don't put all your eggs in one basket

引力常量的数值是英国物理学家卡文迪许用______装置测得．