Making a circle with the thumb and the pointer finger means "okay" in the United States, while in Turkey, it is a crude sexual invitation. Similarly, giving a thumbs$-$up in the United States implies approval, but in Turkey, this same gesture is obscene. This difference shows that:

The Turkish culture is more conservative

Americans are generally perceived as being aggressive and pushy

Unspoken language is not an important factor in communication

Many nonverbal cues are culturally bound

A and $B$