The correct answer is D. The primary motivation for economic activity is to achieve collective societal goals.
Step-by-step explanation
Socialism is a social, political, and economic system characterized by defending the collective property of the means of production and distribution. According to its ideals, the State must control the means of production and distribution to establish a fair and supportive society, without social classes and with an equal distribution of wealth that serves to achieve collective social objectives. According to the above, the correct answer is D. The primary motivation for economic activity is to achieve collective societal goals.