An investor decides to open a leveraged position on XYZ Inc and buys $400$ shares.XYZ shares are priced at $10$ per share.Initial margin requirement is $20\%.$What is the possible margin and maximum possible loss on this position $?$ A$,$ Margin $800,$ Max. loss $4,000.$ B$,$ Margin $800,$ Max. loss $800.$ C$,$ Margin $2,000,$ Max. loss $4,000.$ D$,$ Margin $200,$ Max.loss $400.$