Answer: B.
Explanation: Their parents insist that they don’t pay attention to them and that they dress inappropriately
Qué es eso? Yo estado hablando español durante años y nunca he visto esto
You're correct the answer is está
No comí con mi abuela en el restaurante porque ya había comido (b) antes en casa.
La is the definite article for feminine nouns. Ex: La Fruta: The Fruit (Note: la and fruta both end in "a". That's how you know it's a feminine noun.)
For El it is the definite article for masculine nouns. Ex: El Libro: The Book (Note: for el, nouns end in "o")