Choose the right variant. In Bulgarian body language nodding your head up and down _______ 'no'.

The correct answer is means.

Explanation:

The sentence is about Bulgarian body language. In Bulgaria, nodding the head up and down signifies 'no', while shaking the head side to side signifies 'yes'. The sentence needs a verb that indicates what the action of nodding signifies.

Let's analyze the options:

• mean: This is the base form of the verb. It doesn't fit grammatically in this context.
• is meaning: This is grammatically incorrect as a verb to complete the sentence.
• means: This is the third-person singular present tense of "mean", which correctly fits the singular subject "nodding your head up and down". It translates to "означает" in Russian.
• meant: This is the past tense of "mean". The sentence is in the present tense context.

Therefore, "means" is the correct word to complete the sentence, indicating that the action signifies "no" in Bulgarian culture.

Ответ: means