C

[can't make an omelette without breaking (some) eggs]

To achieve a certain goal one must sometimes incur damage, experience difficulties, or make sacrifices. — A proverb.

* /When we drove across the country, we put a lot of mileage on our car and had a  […]

[can't see the wood for the trees] or

[can't see the woods for the trees] or

[can't see the forest for the trees]  {v. phr.}

To be unable to judge or understand the whole because of attention to the parts; criticize small things and not see the  […]

[cap]

See:

[FEATHER IN ONE'S CAP],

[SET ONE'S CAP FOR],

[PUT ON ONE'S THINKING CAP].

[cap the climax]  {v. phr.}

To exceed what is already a high point of achievement.

[card]

See:

[CREDIT CARD],

[FLASH CARD],

[HOUSE OF CARDS],

[IN THE CARDS] or [ON THE CARDS],

[LAY ONE'S CARDS ON THE TABLE],

[PLAY ONE'S CARDS RIGHT],

[PUT ONE'S CARDS ON THE TABLE],

[STACK THE CARDS],

[TRUMP CARD].

[cards stacked against one]

See: [STACK THE CARDS].

[card up one's sleeve]  {n. phr.},  {informal}

Another help, plan, or argument kept back and produced if needed; another way to do something.

John knew his mother would lend him money if necessary, but he kept that card up his sleeve.

* /Bill always  […]

[care]

See:

[COULDN'T CARE LESS],

[HAVE A CARE],

[GIVE A HANG] or [CARE A HANG],

[TAKE CARE].

[carpet]

See:

[CALL ON THE CARPET],

[MAGIC CARPET],

[ROLL OUT THE RED CARPET].

[car pool]  {n.}

A group of people who own cars and take turns driving each other to work or on some other regular trip.