a. Every vector space V contains at least one subspace that is the zero subspace.
b. If U, V, and W are vector spaces such that W is a subspace of V and U is a subspace of V, then W = U
c. If W is a subspace of R2, then W must contain the vector .
d. If V and W are both subspaces of a vector space U, then the intersection of V and W is also a subspace of U