Why Did Spain Not Involve Itself in the Acquisition of Colonies

Why did Spain not involve itself in the acquisition of colonies while other European countries gained territories?

A) Spain's population was so meager that it could not afford to have citizens migrate beyond its borders.
B) Several European countries continued to hold grudges against Spain; therefore, at every turn, Spanish emigrants were blocked or thwarted in their attempts to gain territory.
C) Spain had seldom been involved in colonial expansion; the mentality opposed to colonization carried on into the modern era.
D) The Catholic inhabitants in Spain, the majority of Spanish people, were averse to colonization.
E) Spain had lost its colonies to the United States in the Spanish-American War of 1898.