Answer:
c. Memories of facts and personal events that can be consciously retrieved 
Explanation:
Explicit memories - 
It refers to the type of memory , where the person consciously tries to recollect some incident or activity , is referred to as the explicit memories . 
It is also known as the declarative memory . 
Any thing which the person is trying to remember intentionally is stored in the explicit memory . 
The memory is used for remembering time , date etc. 
The type of explicit memory are - Semantic memory  and Episodic memory
Hence , from the given scenario of the question , 
The correct answer is c.