How do the two species that make up a lichen benefit from their symbiotic association?

A)The fungi receive carbohydrates from the algae, while the algae receive nitrogen from the fungi.
B)Both partners are able to grow on substrates on which each would not be able to grow on their own.
C)The algae receive carbon as a result of the fungi's ability to degrade lignin and cellulose, while the fungi receive nitrogen from the algae.
D)The fungi receive carbohydrates and, in some cases nitrogen, from the algae, while the algae gain a "home" that anchors them on the substrate.