Nancy immediately remembers she had promised to return her grandmother's call from earlier this morning. what type of memory is being proposed here?

a. sensory memory
b. short term memory
c. long term memory
d. storage

The fact that Nancy immediately remembers she had promised to return her grandmother's call from earlier this morning is example for short term memory. B The other term is primary memory. 
The shrt term memory describes the memory in which a small amount of information in mind in an active state for a short period of time.