Please read the following text and summarize it. The final output should be limited to 50 words. Here is the text: NAME_1 has been granted extra time to decide whether to compete in the World Cross-Country Championships.The 31-year-old is concerned the event, which starts on 19 March in France, could upset her preparations for the London Marathon on 17 April. 'There is no question that NAME_2 would be a huge asset to the GB team,' said NAME_3 of UK Athletics. 'But she is working out whether she can accommodate the worlds without too much compromise in her marathon training.' NAME_4 must make a decision by Tuesday - the deadline for team nominations. British team member NAME_5 said the team would understand if NAME_4 opted out of the event. 'It would be fantastic to have NAME_2 in the team,' said the European cross-country champion. 'But you have to remember that athletics is basically an individual sport and anything achieved for the team is a bonus. 'She is not messing us around. We all understand the problem.' NAME_4 was world cross-country champion in 2001 and 2002 but missed last year's event because of injury. In her absence, the GB team won bronze in Brussels. There should be exactly 7 paragraphs separated by the markdown divider: ***.
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