Answer:
a. undifferentiated
Step-by-step explanation:
Undifferentiated marketing strategy -
It is the type of marketing strategy , which focus on the complete market instead of focusing on some selected portion of the market , is known as undifferentiated marketing strategy .
This strategy uses a single marketing to promote or produce a particular product .
Hence , from the question , the strategy used in the question , is the undifferentiated marketing strategy .