A. is working
B. has been working
C. is being working
D. does
Past perfect continuous tense is used when a work is being continued for some time from the past. has been working is the most suitable option.
A. is working
B. has been working
C. is being working
D. does
Past perfect continuous tense is used when a work is being continued for some time from the past. has been working is the most suitable option.