Which meaning of 'strained' most closely matches its meaning in the following passage (lines 9–10)?
a) Overstretched or forced
b) Relaxed and easy
c) Unstrained and natural
d) Restrained and controlled

NORA: No, I have never been happy. … Only merry. And you have always been so kind to me. But our home has been nothing but a playroom. I have been your doll-wife, just as at home I was papa's doll-child; and here the children have been my dolls. I thought it great fun when you played with me, just as they thought it great fun when I played with them. That is what our marriage has been, Torvald. …

HELMER: There is some truth in what you say—exaggerated and strained as your view of it is. But for the future it shall be different. Playtime shall be over, and lesson-time shall begin.