Read the following paragraph and determine if the hypothesis is true:

Prolonged exposure to UV-B light can cause sunburn, and there are worries that damage to the ozone layer may lead to an increase in the incidence of skin cancer.

Available options:
a). Yes;
b). It's impossible to say;
c). No;
Hypothesis: Prolonged exposure to UV-B rays can cause skin cancer unless there is shade.



b).