What is the oldest U.S. National Park?

Here is the question :

WHAT IS THE OLDEST U.S. NATIONAL PARK?

Here is the option for the question :

Yosemite
The Grand Canyon
Yellowstone
Sequoia

The Answer:

And, the answer for the the question is :

Yellowstone

Explanation:

[STC002874] Yellowstone National Park is not only known for its magnificent landscape and incredible natural wonders, but it is also a significant historical landmark. Yellowstone became the first US National Park in 1872 when President Ulysses S. Grant signed it into law, and it is also regarded as one of the first national parks in the world. It is still one of the most visited protected regions in the United States, boasting attractions such as Old Faithful Geyser and Yellowstone Lake.