. Which of the following best defines “contribute”?
A. To take away from something
B. To refuse to help others
C. To give or add something to help a cause
D. To copy someone else’s work

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Aptitude : Problems on Trains › ViewA train travelling at 48 kmph completely crosses another train having half its length and travelling in opposite direction at 42 kmph, in 12 seconds. It also passes a railway platform in 45 seconds. The length of the platform is
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The dolphin is ___.
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