Mr clark for the same company for twenty-five years. a) is working b) works c) has been working d) has worked

Я уверена на 100% Что ответ d) has worked

My grandparents (1) were born in Hungary in the 1920s. They (2) came to England in 1946, after the war. My grandfather worked in a factory in Birmingham and he (3) studied English at night. My grandmother (4) stayed at home because she only (5) spoke Hungarian and so she couldn’t get a job. Life was difficult because my grandfather (6) didn't earn much money in the factory. My grandparents (7) had three children, my mother and my two uncles. They (8) helped their parents as much as they could. My grandparents (9) stopped to work when they were sixty and they liked having a lot of free time together. Unfortunately, my grandfather (10) died in 1994, but my grandmother is still alive.

ЛИШНИЕ - marry / become / like???

1) Logical operations performed (причастие II – Participle II, определение) by a computer are comparing, selecting, sorting, and determining.
2) The input unit consists of some devices using (причастие I – Participle I Simple, определение) different means.
3) Discussing (причастие I – Participle I Simple, обстоятельство) the advantages of the new memory unit the professor gave the students all the necessary explanations.
4) Having punched (причастие I перфектное – Participle I Perfect, обстоятельство) holes in a card the operator put it into the computer.