Final answer:
The sentence provided does not contain any incorrect pronouns. The pronoun 'its' is used correctly to refer to the Japanese government.
option 'b' is the correct
Step-by-step explanation:
The sentence "Following the string of nuclear disasters caused by the March 2011 earthquake and tsunami, the Japanese government closed many of its nuclear facilities and resolved to find safer and more efficient energy sources." contains no error in the use of pronouns.
The pronouns used correctly refer back to their antecedent, 'the Japanese government,' and therefore, the pronoun 'its' is appropriate as the government is a singular, non-human entity.