Tania has recognized that her eating behaviors are not healthy. her response to stress previously was to severely restrict her calorie intake, often eating only one small meal per day. her weight had dropped to unhealthy levels. in order to address her unhealthy eating patterns, she made several changes in her daily routines and has consistently been eating better for the past 4 weeks. she is feeling much better. according to the transtheoretical model, tania is in the phase of behavior change.

Action phase.

Explanation:

According to the Transtheoretical Model, Tania is in the action phase of behavior change. The Transtheoretical Model of Change is a biopsychosocial model that describes the phases of the process of behavior change. This model treats change as a process in time and not as a single behavior. One of its stages is action. In this phase, there are observable changes in behavior. This stage has to last for at least six months being consistent with the changes made in the daily unhealthy routines.

the answer is d.index