Réécris les phrases suivantes en mettant les adjectifs au superlatif

a) New York City is the biggest and most populated city in the United States.
b) Washington, D.C. is the most visited city in the United States.
c) Los Angeles is one of the sunniest cities in the United States.
d) Alaska is the largest and coldest state in the United States.
e) The Mississipi River is the longest river in the United States.