Compare the vulnerability of the heads of executive departments versus those of regulatory agencies. CHOOSE ONE FROM BELOW

Both types of heads can be fired at the president's will
Neither heads can be fired by anyone except a congressional committee
The heads of the former can be fired at the will of the president; while the heads of the latter can't be fired during their terms except for extreme misconduct.
In the former, heads cannot be fired during their terms of service, while in the latter, the president can fire the heads at will

The vulnerability of the heads of executive departments versus those of regulatory agencies depends on the choice made from the options above.

1. Both types of heads can be fired at the president's will:
In this case, both heads of executive departments and regulatory agencies have equal vulnerability. They can be fired by the president without any restriction or necessity for misconduct.

2. Neither heads can be fired by anyone except a congressional committee:
In this scenario, both heads of executive departments and regulatory agencies are equally protected from being fired by the president. Their only vulnerability lies in the hands of a congressional committee, which has the authority to dismiss them.

3. The heads of the former can be fired at the will of the president; while the heads of the latter can't be fired during their terms except for extreme misconduct:
Here, the heads of executive departments are more vulnerable compared to the heads of regulatory agencies. The president has the power to dismiss the heads of executive departments whenever desired. On the other hand, the heads of regulatory agencies enjoy protection from being fired during their terms, unless they engage in extreme misconduct.

4. In the former, heads cannot be fired during their terms of service, while in the latter, the president can fire the heads at will:
In this case, the heads of executive departments are less vulnerable compared to the heads of regulatory agencies. The latter can be fired by the president at any time, while the heads of executive departments have increased job security as they cannot be dismissed during their terms of service.

Overall, the vulnerability of the heads of executive departments and regulatory agencies varies depending on the specific circumstances stated in the chosen option.