The Microsoft Access wildcard character "*" (asterisk) indicates a sequence of one or more unspecified characters in a Microsoft Access SQL query

In order for an optimization problem to have multiple optimal solutions:

A) the objective function and one constraint must have the same y-intercept. B) the objective function and one constraint must have the same slope. C) two or more of the constraints must not have intersection points. D) two or more of the constraints must have the same slope.

__________, in the context of passwords, refers to an adversary's attempt to learn the password by observing the user, finding a writ

or some similar attack that involves the physical proximity of user and adversary. What will be an ideal response?