An e$-$commerce company that sells cups online found that more than $50\%$ of people would add products to the shopping cart, but will later abandon the purchase without completing the payment. Which of the following research method would allow the company to determine why $($ie$.$ the reasons$)$ these people behaved this way. Select the most appropriate option.

Question $22$Answer

a$.$

Focus group

b$.$

Environmental scanning

c$.$

Questionnaire$-$based survey

d$.$

All A$),$ B$)$ and C$)$ are good options

e$.$

A$)$ and B$)$ are good options

f$.$

A$)$ and C$)$ are good options

g$.$

B$)$ and C$)$ are good options