Under what right does this investigator have to ask for the encryption algorithms and keys?

Nathan is the senior network administrator for Undulating Innovations, a software development company in Los Angeles. Nathan’s company typically develops secure email programs for state and local agencies. These programs allow these agencies to send and receive encrypted email using proprietary encryption and signing methods. An employee at one of the state agencies has been arrested on suspicion of leaking sensitive government information to third world countries for profit. When the US federal government steps in, they seize the employee’s computer and attempt to read email he sent but are not able to because of the encryption software he used. Nathan receives a call from an investigator working forthe CIA on this particular case. The investigator tells Nathan that his companyhas to give up the encryption algorithms and keys to the government so they can read the email sent by the accused state employee. Under what right does this investigator have to ask for the encryption algorithms and keys?

A.
The federal government can obtain encryption keys from companies under the Government Access to Keys (GAK) rule.

B.
The CIA investigator can obtain the proprietary keys and algorithms from Nathan’s company due to Eminent Domain laws.

C.
Since this has turned into a federal case, the government has the right to obtain proprietary information from Nathan’s company under Juris Prudence laws.

D.
The investigator can ask for and obtain the proprietary information due to Habeas Corpus laws.