Choose the clearest passive sentence when the actor is unknown.
กSomeone found the access card near the main entrance by unknown.
ขThe access card was found near the main entrance.
คThe access card found near the main entrance.
งNear the main entrance was finding the access card.
เฉลยอธิบาย
passive voice เหมาะเมื่อไม่ทราบผู้กระทำ และต้องใช้ was + past participle