5. A toy has 2 buttons (1 yellow, 1 red) and 100 small wooden figures that can stand or sit. Pressing the red button once will make 1 standing figure sit down; pressing the yellow button once will double the number of standing figures. Now, only 3 figures are standing, and you need to make 91 figures stand. What is the minimum number of button presses required?
(A) 5
(B) 6
(C) 7
(D) 8
5.C.
3(yellow)6(yellow)12(yellow)24(red)23(yellow)46(yellow)92(red) 91. A total of 7 button presses are required.