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How can managers use the grapevine as an asset? a. by learning who the key people in the grapevine are, managers can use the grapevine to start a cluster chain. b. By leaming who the key people in the grapevine are, managers can use the grapevine to sound out employee reactions to new ideas. c. Dy learning who the key people in the grapevine are, managers can use the grapevine to start a gosip chain, communicating inaccurate information. d. Ay using the grapevine, managers can promote vertical communication e. Ay uing the grapevine, managers can maintain a hierarchical system