B. Again, there are many more examples of repetitive prayer, which are accepted in Scripture, rather than rejected. Yes we should abide by the caution of 'Vain' repetition of prayer as heathens do. Christians are certainly not heathens. However in 'B', a second type of prayer repetition, or 'Useful', is shown. This has long been a stumbling block for fundamentalists and for no real reason.
Catholics call priests 'father'.
This is why the stumble. Absolutely right again. We have only one GOD the Father who is in Heaven. In far more verses the word 'father' is evoked for creatures by the apostles, and by Jesus Christ Himself. Using the logic in 'A', it would have to translate to, 'you would have to love less, the Father in heaven, than myself, to be my disciple'.