Please answer the following question by reasoning step-by-step.
He just needed a few things from the shopping center, but he could hardly get down an aisle it was so packed with what?\nOptions:\n- urban area\n- children\n- people\n- stores\n- suburbs

people
Shopping center is generally crowded with people.

It is so difficult to get things when it is packed with people.

.

The final answer: people