Is the Order of the Motor Sequence of Sitting,standing,and Walking

Multiple Choice

Is the order of the motor sequence of sitting,standing,and walking consistent across children?

A) yes, but the age of achieving each milestone varies considerably
B) yes, and the age of achieving each milestone is quite constant
C) no, as it occurs in different order in different cultures
D) no, as it occurs in different order due to motivational factors within the individual child