Dan described two layers of Earth's atmosphere. Layer A: Allows long-distance radio communication
Layer B: Separates outer space from Earth's atmosphere

Which statement is most likely true? (5 points)

a
Layer A is the thermosphere and Layer B is the exosphere.

b
Layer A is the exosphere and Layer B is the thermosphere.

c
Layer A is the troposphere and Layer B is the stratosphere.

d
Layer A is the stratosphere and Layer B is the troposphere.