The earliest inhabitants of the US arrived at least O 12,000 years ago O 900 years ago O 15,000 years ago O 14,000 years ago

Correct answer is 15 000 years ago.

Explanation:

The first option is correct answer as we have material evidences in the region of Bluefish Caves, that dates back to the period even as old as more than 20 000 years.

That is why all other options are false. Especially second option as in that period this territory was inhabited by numerous tribes. And of course, remaining two option are not correct also, as we said that it was inhabited much before that period.

i would expect light rain in pittsburgh throughout the following 24 to 48 hours. the lower/falling weights in urban areas toward the west demonstrate that a low weight framework is moving from west to east toward pittsburgh. low weight frameworks are ordinarily connected with precipitation. the way that you don't see a major drop in temperature in the more western urban areas demonstrates the low weight framework is moving with a warm front, so just light rain would be normal. substantial downpours or progressively vicious climate is just typically connected with chilly fronts, where the warm air is pushed up and over a cool front quickly. this quickly rising air (convection) is what gives you heavier torrential downpours, and other conceivably serious weather conditions.

its ok