is preliminary research conducted to increase the understanding of a concept, to clarify the exact nature of the problem to be solved, or to identify important variables to be studied.

Exploratory Research

Step-by-step explanation:

Exploratory Research is a preliminary research method that  implement various research methods to increase the understanding of a concept, to clarify the exact nature of the problem to be solved, or to identify important variables to be studied.  

For example, if i'm making analysis on the quality of customer care service at  particular firm, let's say MTN GlobalCom. Exploratory research method will be greatly advantageous if being used for such analysis because of the ways it is used for data collection and selection of variables. It will assist me to determine the problems the customer care service are facing with their clients and how to tackle them.

all but the second one

step-by-step explanation:

cuz that one goes over 180

mark brainliest

-6 is the correct option from the above given options