ASAP DUE IN 5 MINUTE PLEASE HURRY. ANY TROLLS WILL BE REPORTED. I AM GIVING ALL MY POINTS SO PLEASE. ALSO MULTIPLE ANSWERS PLS!! Select all that apply.
The ionosphere is.

A)used to send radio signals

B)the coldest layer in the atmosphere

C)made of charged atoms called ions

D)responsible for Earth's weather​

What happens to rock when acid reacts with it?

Why have the countries of the region had difficulty establishing democratic governments in recent years? choose all answers that are correct b is also correct i need to know if theres any morecommunists have overtaken the countries of the caucasus region. the soviets established national borders in the region without considering the location of ethnic groups. fighting continues between armenia and azerbaijan over the nagorno-karabakh region. civil war between communists and islamic groups in tajikistan resulted in thousands of deaths and refugees are forced to flee. in a test!

In the 1400s, portugal’s economy was based on a. industry b. exports c. finance d. trade