category for each list of clouds?

Question

what is the category of these list of clouds
list 1. __________
-stratus
-altostratus
-nimbostratus
-cirrostratus

list 2._____________
-stratocumulu
-altostratus
-cirrocumulus


p.s. i'm thinking the answers would be 'middle clouds'/'high clouds'/'low clouds..

i need answers asap..

Answer 1

List 1 are Family C (low clouds)

List 2 are Family B (Medium-level) and Family A (High-level)

Answer 2

List 1 is 'stratiform'(sheet like) clouds. List 2 is cumuliform ( Cauliflower like)clouds; but it should contain 'altocumulus' instead of 'altostratus'.
Note that both lists contain 'altostratus'.
Low clouds are stratus,stratocumulus,cumulus and cumulonimbus..
Medium clouds are altostratus and altocumulus.
High clouds are cirrus,cirrocumulus and cirrostratus.