Before revision:  c) that fluctuations of the dynamics can lead to better exploration of the physical space, thus preventing multiple stable aggregates. From previous results, we may speculate about the fact that chemotactic cells , in many cases, can avoid obstacles by simply following the altered chemical gradient : social interactions seem to be sufficient to guarantee the aggregation of the whole colony past numerous obstacles .
After revision:  c) that fluctuations of the dynamics can lead to better exploration of the physical space, thus preventing multiple stable clusters. Comparing those findings with previous results, we may speculate about the fact that chemotactic cells , in many cases, can avoid obstacles by simply following the altered chemical gradient : social interactions seem to be sufficient to guarantee the aggregation of the whole colony past numerous obstacles .