TBC Purchased 10,000 Shares in ETC for $12 Per Share

TBC purchased 10,000 shares in ETC for $12 per share. However, TBC's broker arranged for TBC to pay only $4 cash per share now with the remaining balance to be paid in monthly instalments. TBC should record the investment by:

A) Debiting the investment account for $40,000
B) Debiting the investment account for $120,000
C) Debiting the investment account for $100,000 and crediting a contra account for $60,000
D) No entry should be made until the securities are fully paid for