Meaning of "Time consuming"

[Zhangbaixiang]

Business English Lesson, Advanced Level

ESL/EFL Test #143 "Job Advertising", question 7

But general sites often produce an insufficient number of qualified applicants, making the process relatively time ......... for the results seen.

(a) consuming
(b) devoting
(c) devouring
(d) wasting

Business English Lesson, Advanced Level

ESL/EFL Test #143 "Job Advertising", answer 7

But general sites often produce an insufficient number of qualified applicants, making the process relatively time consuming for the results seen.

Correct answer: (a) consuming
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What does the "time consuming" imply?
thanks
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I have a dream and I want to know the secret of time and universe.

[Ellesbells]

"Time consuming" means that the process takes a lot of time to accomplish.