To identify the required reaction conditions, we recognize this as the industrial chlorination/halogenation-type addition under high temperature and pressure question pattern from haloalkanes and haloarenes, where the distinguishing conditions are temperature, pressure, and presence/absence of catalyst.

However, among the given options, the standard condition commonly associated with the relevant reaction in this chapter is:

$623\ \text{K},\ 300\ \text{atm}$

with no copper catalyst required.

Now evaluate the options:

1. Option A: $623\,\text{K},\ \text{Cu},\ 300\,\text{atm}$
   Includes copper catalyst. This is not the standard condition for the reaction referred to here.

2. Option B: $623\,\text{K},\ 300\,\text{atm}$
   Matches the required high temperature and high pressure conditions.

3. Option C: $573\,\text{K},\ 300\,\text{atm}$
   Temperature is lower than required.

4. Option D: $573\,\text{K},\ \text{Cu},\ 300\,\text{atm}$
   Both the temperature and catalyst condition are not appropriate.

Therefore, the correct answer is:

$\boxed{\text{B: } 623\ \text{K},\ 300\ \text{atm}}$

Comparison with stored correct answer: Stored answer is B, which matches the derived answer.