A false idea about something is a (B.) misconception.
<u>A misconception is an idea that is based on faulty thinking; therefore, it is a wrong idea that results from incorrect thinking</u>. On the other hand, an assumption is something that is accepted as true without questioning it and an opinion is a belief formed about something. An opinion is related to a personal view. Moreover, a theory is a system of ideas offered to explain a phenomena.
An opinion is a belief or a point of view A theory is a scientific opinion or idea that supports an idea The answer is B, misconception because an Assumption is believing something will happen without fact