What is the youngest US National Park?

Here is the question :

WHAT IS THE YOUNGEST US NATIONAL PARK?

Here is the option for the question :

• Pinnacles National Park
• Gateway Arch National Park
• Congaree National Park
• Joshua Tree National Park

The Answer:

And, the answer for the the question is :

Explanation:

[STC003465] Although the Gateway Arch in St. Louis had been designated a national memorial ever since 1935, it wasn’t until February 22, 2018, that it was upgraded to the status of a national park. In order for a particular area to be given the status of a national park, the United States Congress needs to pass a specialized bill, and the President of the United States needs to sign that measure into law. The iconic arch is only one part of the Gateway Arch National Park; the park also protects the surrounding 91 acres of property along the Mississippi River.