Focusing on what is being said, repeating what you heard, asking a speaker to expand or clarify, looking for non-verbal signals, and listening for requests are principles of listening.

Active listening.

Explanation: This is a technique or skill that can be developed. It basically means that you are completely paying attention to the other person instead of being a passive listener. To demonstrate that you are actually paying attention, you can repeat details that you already heard, make questions or ask the speaker to clarify. With these actions the speaker will know that you are focused on the conversation.  

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.