Final answer:
Bianca can buy a total of 400 shares of Tesla stock at the strike price, as each standard call option contract represents the right to buy 100 shares.
Step-by-step explanation:
Bianca purchased 4 call option contracts on Tesla stock. In the financial markets, each standard call option contract typically represents the right to buy 100 shares of the underlying stock at the designated strike price before the option expires.
Therefore, with 4 call option contracts, Bianca has the right to purchase a total of 400 shares of Tesla stock at the strike price outlined in her option contracts.