Question

which is a merit of a good questionnaire
a- difficulty
b- less number of questions
c- not in proper order
d- invalid question​

Answer 1

ᴀɴsᴡᴇʀ:-

☞ ʟᴇss ɴᴜᴍʙᴇʀ ᴏғ ǫᴜᴇsᴛɪᴏɴ.

...✌✌

Answer 2

Answer:

less number of questions