Mycorrhiza is a mutualistic association. How do the organisms involved in this association benefit from each other?

Mycorrhiza is a mutualistic association between the roots of higher plants and fungi.The organisms involved in this association benefit from each other as in:

A) Fungi get carbohydrates from the plant for its growth.

B) The fungi in turn acts as the extension of root hairs and helps in increased absorption of the mineral and nutrients from the soil.