The influence line diagram for the force in member 'a' of the truss shown below is given by

• A. <img src="/_files/images/civil-engineering/gate-exam-questions/885-3-2.png">
• B. <img src="/_files/images/civil-engineering/gate-exam-questions/885-3-3.png">
• C. <img src="/_files/images/civil-engineering/gate-exam-questions/885-3-4.png">
• D. <img src="/_files/images/civil-engineering/gate-exam-questions/885-3-5.png">