Patient KF, who has an immediate memory span of 1 letter, showed good paired-associate learning of word pairs like "mouse-cheese" when tested 24 hours later. This finding challenges the multistore model of memory, because the finding suggests that:

a.

All of the options

b.

long-term memory store is not unitary

c.

short-term memory store is not unitary

d.

short-term memory is not a gateway to long-term memory

e.

short-term memory store seems to have unlimited capacity