The person holding the position of in the house or representatives is primarily responsible for persuading members of his or her party to vote according to the official party line.

- Whip.

Explanation:

'Whip' in political context is described as the official/member of a political party who holds the charge of enforcing party's disciplines or policies in votes. They are primarily responsible for ensuring that each party member vote as per the conducts or disciplines of the party instead of propagating their own beliefs or ideals. He/she is responsible for convincing the party members to vote as per the discipline or line of the party in the House. Thus, 'whip' is demonstrated as the person who holds the responsibility to ensure effective propagation of conduct and discipline of the party.

the best answer is b.

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