Charles de Gaulle airport, 2D to 2C..?

I have a flight for tomorrow,(my first flight ever)and i should change from terminal 2D to 2C, do i have to use shuttle bus or can i just walk?I have only 1h 10 min until my next plane takes off...

Thanks

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All according as to what door of 2D you come out of, it could take you up to 5 minutes to walk to 2c

I wouldnt panic

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Thanks!That helped a lot.