Method study is considered to be a systematic investigation. A

systematic investigation is based on which of the following principles?

a)     The

purpose of the investigation must be clearly understood and drafted during the

preliminary survey and agreed upon before starting the task itself.

b)     All

relevant information concerning the problem under investigation must be

obtained and recorded. 

c)      The

accuracy and quantity of information will be determined by the nature of the

problem. 

d)     Tentative

conclusions should be formed as the investigation progresses. 

1       a

2       ab

3       abc

4       abcd