Substituting online interactions for face-to-face interactions can be problematic because online relationships have the potential not to be intimate, but __________

Crossover applications such as advertising and merchandising tie-ins, business partnerships, even internal communications to employees are all excellent ______ to corporate social responsibility initiatives.

a. measurements b. extensions c. sources d. signals

Through research, scientists have made many conclusions about facial expressions and people's interpretation of them, including the fact that __________.

A. complex facial expressions are more difficult to interpret B. facial expressions are contagious C. it's almost impossible to spot a phony smile D. a genuine smile is usually long-lasting