Answer
Type II error: to not reject that 50% of adults in the United States believe they will not have enough money in retirement (null hypothesis) when, in fact, a majority of adults in the United States believe they will not have enough money in retirement.
Or, to not reject that $p=0.50$ when $p\gt0.50$
Work Step by Step
This happens when the true $p\gt0.50$, but $P$-value $\gt α$.
