Allied Signal is mainly a systems company, yet supplementing its control systems sales with sales of field instruments such as pressure and temperature transmitters.
A) yet supplementing - yet +verb-ing is incorrect
B) although it supplementing - although needs subject(it) + verb -
C) supplementing - Illogical usage of ing modifier - contrast is lost
D) but it supplements - Correct
E) but they supplement - They can't refer to singular Allied Signal
Answer D
A) yet supplementing - yet +verb-ing is incorrect
B) although it supplementing - although needs subject(it) + verb -
C) supplementing - Illogical usage of ing modifier - contrast is lost
D) but it supplements - Correct
E) but they supplement - They can't refer to singular Allied Signal
Answer D
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