Final answer:
The context of the phrase 'Scrabble used to be common "Now it's forbidden."' suggests a social change, as it indicates a shift in societal norms leading to the prohibition of an activity that was once common.
Step-by-step explanation:
When the statement "Scrabble used to be common "Now it's forbidden." is contextualized, the most appropriate interpretation given the options would be B. Social change. This is inferred because the transition from a commonly accepted activity to being forbidden reflects a shift in societal norms and values rather than outright censorship, legal action, or a decline in popularity that comes purely from disinterest. Historical instances such as state and federal censorship of lewd materials, expansions of bureaucracy and government control over certain expressions of sexual morality, and the restriction of communications and specific terms, all relate to the sociopolitical climate shifting over time, enforcing new norms which lead to certain behaviors or activities being forbidden.