单项选择题

Which of the following orders is true  a. Archimedes took a bath. b. Archimedes discovered his principle. c. The King of Syracuse asked him to solve a problem. d. Archimedes did the experiment on the crown.

A.b,c,a,d
B.c,a,b,d
C.c,a,d,b
D.b,c,d,a