If its plural (los/las/ more than 1 thing) its gustan
If its singular(la/el/ 1 thing) its gusta
The answer is b. political or social.
To give human qualities to a non living thing
When you're talking about nonspecific things.
it's like (a) and (an) in english.
uno is for singular masculine.
una is for singular feminine.
unos is for plural masculine.
unas is for plural feminine.