With Respect to the Potential Influence of a Written Language

Multiple Choice

With respect to the potential influence of a written language on the recall ability of a culture's members,research has:

A) revealed that a written language tends to decrease people's memory ability.
B) shown that a written language tends to increase people's memory ability.
C) revealed that a written language probably has little influence on people's memory ability.
D) not yielded a definitive conclusion as of yet.