Read the passage given below and answer the question that follows by selecting the most appropriate option.

In this floating village in Brazil, there is only one way to travel. Students go to school by boat. Locals go to worship by boat. Taxis arrive by boat. Even the soccer field is often a boat. There are three homemade fields on land, but they are submerged now in the annual flooding of the Black River. If the wooden goal posts had nets, they would be useful this time of the year only for catching fish. So, young players and adults improvise. They play soccer at a community centre that has a roof but no walls. They play on the dock of a restaurant. And they play on a parked ferry, a few wearing life jackets to cushion their fall. The high-water mark in the Rio Negro this year was the fifth-highest in more than a century of measurements.
As scientists study the impact of deforestation on the Amazon basin, and the cooling and warming of the Pacific Ocean, extreme patterns observed over the last 25 or 30 years raise an important unanswered question: “Are these trends human-induced climate change, or can we explain this with natural variability?” Villagers said that passing boats sometimes knocked down power lines during periods of exceptionally high water. And while the soccer fields are usually available for about half the year, the land has recently been dry enough for only four or five months of play. “We don’t have a place for the children to play,” said de Sousa, a shop owner. “They are stuck in the houses, bored.” The most adventurous, though, will find a game somewhere.

The wooden goalposts had nets that were _____ during floods.