C. i think B but it can't be B cause the cultural revolution happened way before modern times so go with C or D
Her speeches must be brief (short, concise).
Brevity is a noun that means concise, to the point and shortness of time. It comes from the Latin root "brevis", which is also the root of the word brief, the adjective correspondent to the noun brevity, which also means a concise summary or statement or (something) of a short duration. So concluding, if a speaker is known for her brevity then her speeches must be brief, that is, short or concise.
This is what I found... Around 75% of farmers reported on spending 10 hours or more a day for harvesting farm work.
When measuring distances, is not uncommon for a smaller object in the sky to be closer to Earth than a larger object. This simply means that the larger object issignificantly larger than the smaller object. They try to accurately estimate the object’s distance. One way they do this is to study the light it emits. This helps them immensely.