Which of the following statements is true of the Americans with Disabilities Act $($ADA$)?$

Multiple Choice

It covers those firms with $50$ or more employees.

It provides that each and every business must provide unfettered access to all differently$-$abled people.

It is applicable to large business firms with a turnover of more than $10$ million dollars.

It allows entrepreneurial businesses to exclude candidates who need physical adaptations to work at the firm.