What would be the least effective detail for a description about a new amusement park?

a. Children sip lemonade and munch on popcorn.
b. Tickets can be purchased in advance or at the entrance gate.
c. All nine of the roller coasters have been tested for safety and comfort.
d. Guests must meet minimum height requirements to ride any of the high-speed rides.

a. Children sip lemonade and munch on popcorn.