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The artificial activity which indicates that an activity following it cannot be started unless the preceding activity is complete, is known as-

ADummy

BTotal float

CEvent

DFree float

Answer:

A. Dummy

Read Explanation:

Dummy activity is used to indicate that an activity following it cannot start unless the preceding activity is complete. It represents a logical precedence relationship and takes zero time and resources to perform. It is used to establish uniqueness in the network when two or more activities start from a single node and terminate at the same node

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