Which of the following are Cations? (Select all that apply) K(+)

O(2-)

Cl(-)

NH4(+)

Al(3+)

OH(-)

k(+)

NH4(+)

Al3(+)

Explanation:

cations are those elements who donate their electrons and we put a positive charge on it and receivers get negative charge and they are called anionThank you so,much Please let me know how you feel and is helps you or not

c- cold periods in earth's history during which glaciers covered much of the surface.

explanation:

the answer is option a.