单项选择题

Glynis Davis:
I first piled on the pounds when I was in the family way and I couldn’t lose them afterwards. Then I joined a slimming(瘦身) club. My target was 140 pounds and I lost 30 pounds in six months. I felt great and people kept saying how good I looked. But Christmas came and I started to slip back into my old eating habits. I told myself I’d lose the weight at slimming classes in the New Year... But it didn’t happen. Instead of losing the pounds, I put them on. I’d lost will-power and tried to believe that the odd bags of fish and chips didn’t make any difference but the scales don’t lie.
Roz Juma:
To be honest, I never weigh myself any more -- I’ve learnt to be happy with myself. It seemed to me that I would feel sorry about every spoonful of tasty food that passed my lips. My idea is simple. You shouldn’t be too much thinking about food and dieting. Instead, you should get on with life and stop dreaming of a superthin body. This is obviously the size I meant to be and, most of all, I’m happy with it.
Lesley Godwin:
I was very happy after winning Young Slimmer of the Year. I’d look in the mirror, unable to believe this slim lady was me! That might trove been my problem -- perhaps from then on I didn’t pay any attention to myself. Winning a national competition makes everything worse, though, because you feel the eyes of the world are fixed upon you. I feel a complete failure because I’ve put on weight again.

The underlined word "scales" in the first paragraph most probably means"（）

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