Future contracts confusion

Edwen Co is considering a currency futures contract. Which of the following statements about currency futures contracts are true?
1 The contracts can be tailored to the user’s exact requirements.
2 The exact date of receipt or payment of the currency does not have to be known.
3 Transaction costs are generally higher than other hedging methods.
A.1 and 2 only
B.1 and 3 only
C.2 only
D.3 only
HERE THE ANSWER Is C, this means there’s no fixed duration/date in futures? But acca technical article says futures are for fixed duration

Also here in this question
Which THREE of the following are reasons why futures are not always a perfet hedge?
A Futures contracts are in standard sizes which may not coincide with how much
H Company wants to borrow
B Futures have standardised contract dates, which may not coincide with when Company wants to take out the loan
C Basis risk
D Interest rates are hard to predict

A,B,C are correct. In the above question it was said exact date of receipt or payment Dosen’t have to be known but in B option of second question it says futures have standardised contract dates. I’m very confused if they have fixed dates or not? And what’s the difference in these two statements?