Pamela Is Trying to Place Her Rectangular Block in the Rectangular

Pamela is trying to place her rectangular block in the rectangular opening of her "know your shape" toy, but it is too wide to fit.She studies the block for some time and then grabs it, rotates it sideways, and the block successful falls in the opening.What substage of sensorimotor development was Pamela demonstrating?

A) the primary circular reaction substage
B) the secondary circular reactions substage
C) the coordination of secondary schemes substage
D) the invention of new means through mental combinations substage