Vamos analisar cada uma das opções para encontrar a correta: a) "Daniel and Marla are going to buy a new and expensive sport car to his son." - O uso de "his" está incorreto, pois deveria ser "their" para se referir ao filho de ambos. b) "The collected data is important to discover the average age of our students." - Esta frase está correta. "Data" pode ser tratado como singular ou plural, mas a construção está adequada. c) "The newcomer neighbours have a two-year-old baby and are planning to have another child before the next X-mas." - A palavra "neighbours" está correta, mas "newcomer" deveria ser "newcomers" para concordar no plural. d) "They are looking up the lost documents inside the office but I think that they won t find it before the meeting." - O uso de "it" está incorreto, pois deveria ser "them" para se referir a "documents" (plural). e) "Parker is used to read the Bible before sleep. He is a very Catholic man." - O correto seria "used to reading" em vez de "used to read". Após essa análise, a opção correta é: b) The collected data is important to discover the average age of our students.