Final answer:
The correct answer is 'Yo camino; todos los días.'
Step-by-step explanation:
To fill in the blanks in the sentence '¿Con cuánta frecuencia caminas?' which means 'How often do you walk?' we need to conjugate the verb 'caminar' (to walk) and add the phrase 'todos los días' (every day). The correct option is A- 'Yo camino; todos los días.' This means 'I walk; every day.'
Learn more about Conjugating verbs in Spanish