It is an oversimplified view of cattle raising to say that all one has to do with cattle is leave them alone while they feed themselves, corral them and to drive them to market when the time is ripe.
A. all one has to do with cattle is leave them alone while they feed themselves, corral them and to --infinitive parallelism is bad -- wrong
B. all one has to do with cattle is to leave them alone to feed themselves, to corral them and -- since 'to' is missing in the third arm, this is unparallel.
...
A. all one has to do with cattle is leave them alone while they feed themselves, corral them and to --infinitive parallelism is bad -- wrong
B. all one has to do with cattle is to leave them alone to feed themselves, to corral them and -- since 'to' is missing in the third arm, this is unparallel.
...
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