contestada

Briefly describe a plausible study design that has the potential
to demonstrate the effect of thinking positively on cardiovascular
health.
a) A study examining the impact of positive thinking on cardiovascular health in adults through a 6-week randomized controlled trial.

b) A cross-sectional survey investigating the association between positive thinking and cardiovascular health.

c) An observational study tracking the cardiovascular health of individuals who practice positive thinking over a one-year period.

d) A longitudinal study exploring the long-term effects of positive thinking on cardiovascular health in a diverse population.