Part A:
The best response to support the claim that increasing solar energy will interrupt the delivery of electricity to Californians is:
by describing the power outages that happen when too much solar energy is produced.
Part B:
The evidence from the text that best supports the answer to Part A is:
“Excess solar electricity can overload power lines. Overloaded power lines lead to power blackouts. Blackouts are inconvenient for people and harmful to businesses. They must be avoided.”