Answer:
a commercial bank
Step-by-step explanation:
A commercial bank is a deposit accepting institutions regulated by the central bank of a country. The banks play a crucial role in availing capital to businesses. They accept deposits in the form of savings from customers. They keep a small fraction(reserves) in their custody to cater for withdrawal and loan out the rest. Banks, therefore, pool resources together for businesses and households to borrow.
Since banks have a wide customer base, they are able to mobilize huge amounts of resources to loan out. Commercial banks are the best institution to issue a loan to Glenn and Maggie. Saving and loan, credit unions have a limited membership and may not have sufficient resources to issue a loan to Glenn and Maggie.