Marta is twenty eight years old, and she has no dependents. she has saved an emergency fund and an extra $1,500. she would like to save or invest this money in hopes that it will grow fast. marta does not mind taking risks with her money. which type of account or investment is best for her? a. fifteen-year savings bond b. mutual fund c. basic savings account earning 1.3 percent interest, compounded monthly d. ida