From the given options, choose the one that rightly explains the following idiom:

to call a spade a spade

(A) to speak rudely

(B) to speak directly

(C) to speak diplomatically

(D) to speak frankly

Choose the correct answer from the options given below:

The correct answer is (B) and (D) Only.

Understanding the Idiom:
The idiom "to call a spade a spade" means to speak about something truthfully, plainly, and directly, without beating around the bush or using evasive language. It implies describing things exactly as they are, even if they are unpleasant or embarrassing, rather than softening the description with euphemisms.

Analyzing the Provided Options:
- (A) to speak rudely: While being extremely direct can sometimes be perceived as blunt, the primary meaning of the idiom is about honesty and clarity rather than intentional rudeness.
- (B) to speak directly: This aligns perfectly with the idiom's definition, which is to address things straightforwardly and call them by their actual names.
- (C) to speak diplomatically: This is the opposite of the idiom. Speaking diplomatically involves using tact, euphemisms, and carefully chosen words to avoid offense or conflict.
- (D) to speak frankly: Frankness denotes honesty, sincerity, and open expression. Speaking frankly means stating the truth directly, which matches the essence of the idiom.

Therefore, statements (B) and (D) are the ones that rightly explain the idiom, making (B) and (D) Only the correct choice.