Selina receives an income of $100 and purchases food and drink. One unit of food costs $2, whereas one unit of drink costs $1. Which pattern of spending would indicate that Selina intends to save part of her income?
- Afood 20 units, drink 50 units
- Bfood 30 units, drink 40 units
- Cfood 40 units, drink 20 units
- Dfood 50 units, drink 10 units