This is a sentence transformation question involving direct to indirect speech.
Step 1: Identify the reporting verb and the structure
The reporting verb is "said to'', which changes to "asked'' in the case of a question.
Step 2: Change the tense
Since the reporting verb is in the past tense ("said''), the verb in the reported speech must also change from present ("do'') to past ("did'').
Step 3: Adjust the pronouns and time expressions
"You'' changes to "she'' (referring to the mother), and "these'' changes to "those''.
Step 4: Avoid interrogative word order in indirect speech
The structure "how did she do...'' (Option D) retains interrogative form and is incorrect.
Option C uses correct word order and tense: "how she did all those things together''.
Conclusion: Option C is grammatically correct and follows all rules for converting into indirect speech.