/ MY BROTHER / I / NOT THINK / MISTAKE/ MAKE / THAT / PURPOSE. A....

75. / my brother / I / not think / mistake/ make / that / purpose. A. I don’t think that my brother made that mistake for purpose. B. I don’t think that my brother made that mistake on purpose. C. I don’t think that my brother made that mistake with purpose. D. I don’t think that my brother made that mistake at purpose.