Final answer:
Age groups as an independent variable condition would result in a quasi-experimental design.
Step-by-step explanation:
A quasi-experimental design is a research approach that resembles an experimental design but lacks random assignment of participants to conditions. Based on the given options, the independent variable condition that would result in a quasi-experimental design is a. Age groups. In this case, the researcher cannot directly control or manipulate the participants' age, making it quasi-experimental.