Final answer:
A pie chart is the best type of graph to illustrate Didi's monthly allocation of income to expenses and savings, as it visually shows the proportion of each category in relation to her total income. The correct option is:B. Pie charts
Step-by-step explanation:
To represent Didi's monthly income and her expenditures, a pie chart would be the most effective type of graph. A pie chart provides a visual representation of parts of a whole, which is ideal for illustrating how Didi allocates her monthly income to different expenses and savings.
The pie chart will have slices representing rent, educational fees, other expenses, and savings, each slice's size proportional to the amount spent or saved. The correct option is:B. Pie charts