Too much screen time can cause eyestrain, irregular sleep patterns, and behavioral problems. This kind of negative screen time also inhibits social skills. My son spends all his time in the basement playing video games instead of going outside. Excessive screen time is having a real effect on children, so we should encourage our kids to cut back.

Which sentence shows why the source is not credible?

A “Too much screen time can cause eyestrain, irregular sleep patterns, and behavioral problems.”
B “This kind of negative screen time also inhibits social skills.”
C “My son spends all his time in the basement playing video games instead of going outside.”
D “Excessive screen time is having a real effect on children, so we should encourage our kids to cut back.”