Linda is updating her primary residence with energy$-$efficient improvements, including new insulation, a high$-$efficiency furnace, and energy$-$efficient windows. She$$s aware of the Energy$-$Efficient Home Credit outlined in Part II of Form $5695$ and is calculating her potential tax credits for these upgrades $.$ Considering the credit limitations and qualifications, which of the following statements correctly summarize Linda$$s eligibility for the Energy$-$Efficient Home Credit?

a$)$ Linda can claim a $10\%$ credit on the total cost of her energy$-$efficient upgrades without any upper limit$.$ b$)$ She is eligible for a $$200$ credit for the new windows, $$300$ for the furnace, and a $10\%$ credit for the

insulation $.$

c$)$ Linda$$s credit for the furnace is capped at $$150,$ and she can claim up to $$200$ for her windows and

$10\%$ of the insulation costs $.$

d$)$ The credit for each of Linda$$s upgrades is unlimited, provided they meet energy efficiency standards.