Apki (public key infrastructure) is an arrangement that binds public keys with respective user identities by means of a

Certificate authority

Explanation:

A PKI is stand for the public key infrastructure and by using the PKI it binding all the public keys by their specific user identity in the form of (CA) certificate authority.

The main role of the public key infrastructure is that it helps in binding the public keys by using the registration authority method and it is responsible for ensuring all the registration done efficiently and correctly.

 Therefore, Certificate authority is the correct answer.  

the third answer is correct (c).

the laws that regulate the financing of political campaigns seek to guarantee the smoothness of funding so that there is no abuse of electoral economic power and to avoid the capture of future politicians by the donors.

this is because donor agents have their private interests that are not necessarily the same interests of the society that elected politicians must defend.

thus, interest groups should seek their interests within the legality of lobbying practices that are regulated.

answer; lexical approach;