Each sentence has four underlined parts having words or phrases marked a, b, c, d, identify one of the underlined parts that must be changed to make the sentence correct 

Rasel designed a form of communication enabling (a) people to convey(b)  and preserve their thoughts to incorporate(c ) a series of dots which were read(d) by the finger tips. 

Created: 6 months ago | Updated: 1 month ago
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