The correct answer is Option C) Manors
Medieval Europe was a feudal society where the few owned large parts of land and the many worked on the land as farmers.
The land owners were known as landlords or the landed gentry, while the people who worked on the land were peasants.
Manors usually consisted of land given to knights, heirs or other people directly from the thrown.
They had the right to hold a local court and held considerable influence among the population which worked on the land. The head of this manor, often called the 'Lord' was an important figure in the local economy and politics.
Hence, when an eventual parliament was made, the 'Lords' were the first people who could join it and represent their respective manors.