Marcy is concerned that her findings may be due to an extraneous uncontrolled variable and not her treatment. marcy is most concerned with:

a. triangulation.

b. respondent validation.

c. external validity.

d. internal validity.

c

Step-by-step explanation:

because it's her extraneous uncontrolled variable

horizontal translation of 2 units in the positive x direction

followed by

vertical translation of 3 units in the positive y direction

step-by-step explanation:

the multiplicative inverse of a fraction a/b is b/a. for the multiplicative inverse of a real number, divide 1 by the number. for example, the reciprocal of 5 is one fifth 1/5 or 0.2, and the reciprocal of 0.25 is 1 divided by 0.25, or 4.